NEW YORK ( TheStreet) -- Yahoo! ( YHOO) is expected this week to acquire online sports site Citizen Sports, a report says.

Citizen Sports is a maker of a maker of popular apps and games that allow fans to interact on Apple's iPhone or Facebook, reports the Wall Street Journal's "Boomtown" blog.

It's unclear how much Citizen Sports would sell for, but estimates put its price at about $40 to $50 million, the report says.

-- Reported by Joseph Woelfel in New York.

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